<!DOCTYPE html>
<html>
    <head lang="en">
        <meta charset="UTF-8">
        <title></title>
        <link rel="stylesheet" href="style.css" type="text/css">
    </head>
    <body>
        <p id="p2">css边框样式</p>
        <p id="p1">圆角边框</p>
    </body>
</html>